Paper pulp machine



Oct. 26, 1948. c, LOWE I 2,452,135 I PAPER PULP MACHINE Filed 001.. 26,1944 2 Sheets-Sheet 1 Inventor Oct. 26, 1943. LOWE 2,452,135

PAPER PULP MACHINE 119d 00%. 26, 1944 2 Sheets-Sheet 2' Inventor Jfi/rl65.501443 B, M M

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'Patented' 'oct. ,26, 1948 I PAPER PULP momma John C. Lowe; Quakertown,Pm, asslgnor to Harmer R; Lntz, Sellersville, Pa.

Application October-'28, 1944, Serial No. 560,426

1 I This invention relates to certain new and useful improvementsinpaper pulp machines, and

has more particular reference to'an improved ma-v chine fordisintegrating paper stock and designed for continuous operation.- I

The primary object 'of the present invention .is to provide a machine ofthe above kind includ- ICh-im. (CI. 92-23) IQ adjacent the oppositeendsthereof, the steam.

beingcirculated through the Jacket for heating ing a horizontalcylindrical casing provided with a top paper stock inlet] and a bottomtrash outlet intermediate the endsthereof, oppositely rotated stockdisintegrating heads arranged at opposite ends of-the casing, pulpscreening baskets I or trays mounted in the'lower portion of the cas ingat opposite sides of the trash outlet and having open' adjacent ends forthe circulation of the pulp from end to end of the casing, and pulpoutlets in the bottom of the casing beneath the respective screeningbaskets or trays and at oppo- I II site sides of the trash outlet.

Anotherv object ofthe invention is to provide a machine of the abovekind in which the trash outlet has a valved trap chamber, and whereinmeans is provided for introducing jets of fluid into the trap chamberfor agitating the trash so as. to rej leas'e'entrained pulp so that itmay return to the casing and willinot be'lost by discharge fromthemachine with the trash. I

The exact nature of the present invention, as well as further objectsand features thereoLIwill become apparent from the following descriptionwhen considered in connection with the accompanying drawings. Theinvention consists in the novel form, combination and arrangement ofparts hereinafter more fully described, shown in the accompanyingdrawings and claimed.

In the drawings, wherein like reference characters indicatecorresponding parts throughout the several views:

Figure 1 is a central longitudinal vertical sectional view of a paperpulp machine constructed in accordance with the. present invention.

Figure 2 is a transverse section taken 'on the or. The outer wall of thebody 6 is provided with suitable steam inlet and outlet connections 9and the batch of pulp and'treatlng liquid introduced into the cylinder.

intermediate its ends with a top inlet II for the paper stock, anda feedhopper l2, provided with a sliding or other closure l3, may be providedto facilitate introduction of the stock through the opening I I. Thetank 5 may also have a suitable inlet connection I to facilitate theintroduction of the treating liquid within the tank. In addition, thetank is provided intermediate its ends with a bottomtrash outlet i5which is provided near the bottom of the tank with a pair of spacedsuperposed valves I8 and Ida to define a trap chamber C therebetween.Pipes P project into the trash outlet l5 between the valves lB-and Idato facilitate the introduction of jets of fluid under pressure into thetrapchamber so that the trash collected therein may be effectivelyagitated for liberating entrained pulp. Pulp outlets H are provided inthe bottom of the tank 5 at opposite .sldesof the'trash outlet l5.

- 'Rotatable in and, projecting through central stufllng boxes l8 of"the closure heads I are horizpnt'ally aligned axial shafts l9 havingpaper I stock disintegrating and agitating heads centraily. fixed to theinner ends thereof and located within the opposite ends of the tank 5.Each plane of line 2-.-2 of Figure 1, and drawn on an I enlarged scale.I I

Figure 3 is an enlarged fragmentary'vertical' section more clearlyshowing the portion of the trash outlet which is provided with the trapchamber.

Referring in detail to the drawings, the present machine includes ahorigontal elongated cylindrical tank or casing 5 preferably composed ofa cylindrical body 8 having closure heads l bolted or otherwise securedto the ends thereof, said body being of double wall construction toafford a steam jacket 8 between the walls there.

shaft l9 is journa'ledin a bearing 2i provided at the top of a standard22 mounted adjacent the associated end'of the tank, and suitable meansis provided to facilitate driving the shafts l9 so as to rotate theheads 20 in opposite directions, which means may include a pulley 23secured on the outer end of each shaft IS. AS shown more clearly inFigure 2, each stock disintegrating and agitatinghead 20 includes a discfixed on the inner end of the associated shaft i9 and disposed in'aplane at right angles to the longitudinal axis of said shaft, anda'plurality of tangentially arranged disintegrating and agitating vanes2d and longitudinally of the tank in two streams that mounted on theinner face of the disc in a plurality of at least two. circular rowsconcentric with the axis of said disc. These vanes are pref erablyrelatively thinso as to have an efllcient disintegrating action upon thestock, and they preferably taper narrower in depth from their leading totheir trailing ends.- By rapidly driving a the heads 20 in oppositedirections, a violent agitation of the stock and treating liquid is hadin which said stock and liquid are thrown outwardly The body 6 is alsoprovided the tank. Inthis way, all portions of the stock are caused toultimately come under the action of the vanes 24 for being eflectivelydisintegrated. As has been pointed out above, the machine is designedfor continuous operation. In other words, untreated material iscontinuously placed in the machine and disintegrated stock or pulp iscontinuously withdrawn therefrom through the outlets l'l, waste materialbeing discharged from the machine through the outlet It at requiredintervals. In order to permit this operation, it

- is necessary to retain the stock within the casing until it isdisintegrated suiilciently, only finely disintegrated stock beingpermitted to pass from the machine through the outlets H. For thispurpose, two screening trays or baskets 26 and 28a are mounted in thelower portion of the casing 5 at opposite sides of the trash outlet I5and stock inlet ll, said screening baskets or trays being disposed inspaced end-to-end relation and being open at their adjacent ends topermit free circulation of the pulp or stock and treating liquid fromeach endof the casing to the other.

In operation, the paper stock is introduced into the casing 5 throughthe inlet II, and the treating liquid is admitted to the casing throughinlet connection H. The heads are rotated at a suitable speed inopposite directions so as to cause a thorough circulation and agitationof the stock and treating liquid, the latterbeing thrown,outwardly anddirected from opposite ends of the tank in streams that move toward eachother. The violent and eflicient circulation and agitation of themixture causes all portions of the stock to ultimately come under theaction of the disintegrating vanes of the heads 20, and when the pulp isreduced to sumcient fineness, it may pass through the screening basketsor trays 28 and a and pass from the machine through the outlets l1. Anytrash that may be in the paper stock and which is comparatively heavywill ultimately settle in the trash outlet 15 above the upper valve ii.If a great amount of heavy trash is encountered, the upper valve I 6 maybe left open so that the trash will accumulate upon the lower valve ltd.At intervals. the jets of fluid are introduced into the trap chamber Cthrough the pipes P, thereby thoroughly agitating the trash andliberating any pulp that may be entrained therewith so that the lattermay flow back into the tank 5. After being sumciently cleared ofentrained pulp, the trash may be dis-,

charged by closing the upper valve l6 and opening the lower valve lBa.Lighter trash that may become balled within the intermediate portion ofthe tank may be removed from the latter by suitable hoisting meansthrough the stock inlet II. The mixture of paper stock and treatingliquid maybe kept at the proper temperature by heating the same throughthe medium of the steam circulated through the jacket 8. Except whenintroducing the paper stock or removing the lighter trash, the closurell of hopper I! may be kept in closed position.

In actual practice, machines constructed in accordance with the presentinvention have been found to have a very efllcient action sothatthorough disintegration of the stock is had within a minimum lengthof time. Also, the machine is admirably adapted for continuousoperation, as distinguished from batch operation.

From the foregoing description, it is believed that the construction andoperation, as well as the advantages, of the present invention will bereadily understood and appreciated by those skilled in 'the art. Minorchanges in details of construction illustrated and described arecontemplated, such as fairly fall within the spirit and scope of theinvention as claimed.

What I claim is:

' In a machine for the continuous disintegration of paper stock, thecombination of a horizontal elongated cylindrical casing having a Jacketadapted to have steam circulated therethrough for heating stock placedin the casing and provided with a top stock inlet and a bottomvalvecontrolled trash outlet intermediate its ends, means to introducetreating liquid within the upper portion of the casing, a pair ofstationary perforate screening trays mounted in the lower portion oi?the casing in longitudinally spaced relation to each other and atopposite sides of the trash outlet, said screening trays being open attheir adjacent ends, said casing further having bottom pulp outletsbeneath the screening trays and at opposite sides of the trash outlet,horizontal alined shafts journaled in and centrally of the opposite endsof the casing, stock circulating and disintegrating heads secured on theinner ends of the shafts adjacent the ends of the casing and embodyingdiscs having a plurality of concentric circular series of overlappingtangentially disposed pulping vanes on the inner faces thereof, saidvanes being of narrow form laterally of the discs, and means to drivesaid shafts so as to rotate said heads in opposite directions todisintegrate the stock and circulate it from end to end-of the casingwithin and above the screening trays.

. JOHN C. LOWE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS 516,806 Great Britain Jan. 11, 1940

